The way you imagined Daisy sounds like a character that shares some similarities with Game & Watch and Snake. I DO agree that we should use a Daisy where she's most prominent in...Sports and Party Games.
I've been thinking that her 'A' moves can be her tough, tomboy stuff, while her 'B' moves can be her sport/dice block shenanigans. The thing is, I just don't want Daisy to be just another vanilla character. I want her to have a certain gimmick to her style, like how Shulk, Cloud, Little Mac, etc has, and the idea with the dice blocks seems pretty plausible, as it can grant her some random / unpredictable options, and possibly even give her some burst movement options. So she seems like an interesting character already; just adding my thoughts to it since I can identify with it...
...or if all else fails, just luigify her. OH, and long time no see, guys!